JP2019068606A - Motor and manufacturing method of motor - Google Patents

Abstract

The present invention provides a motor having a structure capable of reducing labor and cost of manufacture and suppressing increase in size, and a method of manufacturing such a motor.
SOLUTION: A rotor having a shaft arranged along a central axis, a stator having a coil, radially opposed to the rotor via a gap, and a bus bar electrically connected to a wire extending from the coil And. The bus bar has a plate-like coil connection portion 71a connected to the conducting wire. The coil connection portion includes a through hole 77a penetrating the coil connection portion in the thickness direction of the coil connection portion, and a pair of opposing portions 75a disposed so as to sandwich the through hole in the first direction orthogonal to the thickness direction. Have. The conducting wire is passed through the through hole and contacts the inner surface of the through hole. At least one of the pair of facing portions has a crimped portion crimped toward the other facing portion in the first direction.
[Selected figure] Figure 6

Description

  The present invention relates to a motor and a method of manufacturing the motor.

  A motor is known that includes a conductive member having a bent hook-shaped coil connection terminal. For example, Patent Document 1 describes a motor for an electric power steering apparatus including such a conductive member.

JP 2003-324883 A

  The coil connection terminal portion having the hook shape as described above is manufactured by bending an end portion of a plate-like conductive member into a hook shape. Therefore, the number of times of bending the conductive member increases, and the labor and cost of manufacturing the motor may increase. Moreover, it is necessary to lengthen the conductive member by an amount corresponding to the bending to form the coil connection terminal. Therefore, the whole of the conductive member tends to be large, and the motor may be easily large.

  In view of the above circumstances, the present invention has an object to provide a motor having a structure capable of reducing labor and cost of manufacturing and suppressing an increase in size, and a method of manufacturing such a motor.

  One aspect of the motor according to the present invention includes a rotor having a shaft disposed along a central axis, a stator having a coil, radially opposed to the rotor via a gap, and a wire extending from the coil And an electrically connected bus bar. The bus bar has a plate-like coil connection portion connected to the conducting wire. The coil connection portion is a pair of opposing portions disposed so as to sandwich the coil connection portion in the thickness direction of the coil connection portion, and the first direction orthogonal to the thickness direction. And. The conducting wire is passed through the through hole and contacts the inner surface of the through hole. At least one of the pair of facing portions has a crimped portion caulked toward the other facing portion in the first direction.

  One aspect of the motor according to the present invention includes a rotor having a shaft disposed along a central axis, a stator having a coil, radially opposed to the rotor via a gap, and a wire extending from the coil And an electrically connected bus bar. The bus bar has a plate-like coil connection portion connected to the conducting wire. The coil connection portion is a pair of opposing portions disposed so as to sandwich the coil connection portion in the thickness direction of the coil connection portion, and the first direction orthogonal to the thickness direction. And. The conducting wire is passed through the through hole and contacts the inner surface of the through hole. The through hole is a first through portion through which the conducting wire passes, and a slit-like second through portion extending from the first through portion to one side in a second direction orthogonal to the thickness direction and intersecting the first direction. Part. The dimension in the first direction of the portion sandwiching the second penetrating portion among the pair of opposing portions is smaller than the dimension in the first direction of the portion sandwiching the first penetrating portion of the pair of opposing portions.

  According to one aspect of the motor manufacturing method of the present invention, there is provided a rotor having a shaft disposed along a central axis, a stator having a coil and facing the rotor in the radial direction via a gap, and the coil It is a manufacturing method of a motor provided with the bus bar electrically connected with the extending lead. It includes a connecting step of connecting the bus bar and the conductor. The bus bar has a plate-like coil connection portion connected to the conducting wire. The coil connection portion is a pair of opposing portions disposed so as to sandwich the coil connection portion in the thickness direction of the coil connection portion, and the first direction orthogonal to the thickness direction. And. In the connection step, the conductive wire is passed through the through hole, and at least one of the pair of facing portions is crimped toward the other facing portion in the first direction.

  According to one aspect of the motor and the method of manufacturing the motor of the present invention, a motor having a structure capable of reducing labor and cost of manufacturing and suppressing increase in size, and a method of manufacturing such a motor are provided. .

FIG. 1 is a cross-sectional view showing a motor of the present embodiment. FIG. 2 is a perspective view showing the bus bar of the present embodiment. FIG. 3 is a view of the bus bar of the present embodiment as viewed from the upper side. FIG. 4 is a perspective view showing the bus bar of the present embodiment. FIG. 5 is a view of a part of the bus bar of the present embodiment as viewed from above. FIG. 6 is a perspective view showing a part of the bus bar of the present embodiment.

  The Z-axis direction appropriately shown in each drawing is a vertical direction with the positive side as the upper side and the negative side as the lower side. A central axis J appropriately shown in each drawing is an imaginary line which is parallel to the Z-axis direction and extends in the vertical direction. In the following description, the axial direction of the central axis J, that is, the direction parallel to the vertical direction is simply referred to as "axial direction Z", and the radial direction about the central axis J is simply referred to as "radial direction". The circumferential direction around J is simply referred to as "circumferential direction". In each figure, the circumferential direction is appropriately indicated by an arrow θ.

  Further, the positive side in the Z-axis direction in the axial direction Z is referred to as “upper side”, and the negative side in the Z-axis direction in the axial direction Z is referred to as “lower side”. Further, the side which proceeds in the counterclockwise direction as viewed from the upper side to the lower side in the circumferential direction, that is, the side which proceeds in the direction of the arrow θ is referred to as “one side in the circumferential direction”. The side advancing clockwise as viewed from the upper side to the lower side in the circumferential direction, that is, the side advancing in the direction opposite to the direction of the arrow θ is referred to as “the other side in the circumferential direction”.

  Note that the vertical direction, the upper side and the lower side are simply names for describing the relative positional relationship of each part, and the actual arrangement relationship etc. is an arrangement relationship etc. other than the arrangement relationship etc. indicated by these names. May be

  As shown in FIG. 1, the motor 10 according to this embodiment includes a housing 11, a rotor 20, bearings 51 and 52, a stator 30, a bearing holder 40, a bus bar unit 90, and a control device 80. . The housing 11 accommodates each part of the motor 10. The housing 11 is cylindrical around the central axis J. The housing 11 holds the bearing 51 at the bottom on the lower side.

  The rotor 20 has a shaft 21, a rotor core 22, and a magnet 23. The shaft 21 is disposed along the central axis J. The shaft 21 is rotatably supported by bearings 51 and 52. The rotor core 22 has an annular shape fixed to the outer peripheral surface of the shaft 21. The magnet 23 is fixed to the outer peripheral surface of the rotor core 22. The bearing 51 rotatably supports the shaft 21 on the lower side of the rotor core 22. The bearing 52 rotatably supports the shaft 21 on the upper side of the rotor core 22. The bearings 51 and 52 are ball bearings.

  The stator 30 faces the rotor 20 in the radial direction via a gap. The stator 30 surrounds the rotor 20 at the radially outer side of the rotor 20. The stator 30 has a stator core 31, an insulator 34, and a plurality of coils 35. The stator core 31 has a core back 32 and a plurality of teeth 33.

  The plurality of coils 35 are respectively attached to the plurality of teeth 33 via the insulators 34. The coil 35 is configured by winding a conducting wire around the teeth 33 through the insulator 34. A coil lead wire 36 is drawn upward from each coil 35. The coil lead wire 36 is a conducting wire extending from the coil 35 and is an end of the conducting wire that constitutes the coil 35.

  The bearing holder 40 is disposed on the upper side of the stator 30. The bearing holder 40 has an annular shape centered on the central axis J. The bearing holder 40 holds the bearing 52. The bearing holder 40 is made of metal. The bearing holder 40 has a holder hole 40 a penetrating the bearing holder 40 in the axial direction Z. The coil lead wire 36 is passed through the holder hole 40a.

  The bus bar unit 90 is disposed on the upper side of the bearing holder 40. The bus bar unit 90 has a bus bar holder 60 and a bus bar 70. That is, motor 10 includes bus bar holder 60 and bus bar 70. The bus bar holder 60 has an annular shape centering on the central axis J. The bus bar holder 60 is fixed to the upper surface of the bearing holder 40. The bus bar holder 60 is made of resin.

  The bus bar 70 is held by the bus bar holder 60. The bus bar 70 is supported by the bus bar holder 60 from the lower side. As shown in FIGS. 2 and 3, in the present embodiment, the bus bar 70 is entirely plate-shaped. A plurality of bus bars 70 are provided. In FIGS. 2 and 3, for example, three bus bars 70 are provided. The bus bar 70 has a first member 70a, a second member 70b, and a third member 70c. The first member 70a, the second member 70b, and the third member 70c are separate members. One bus bar 70 is configured by connecting the first member 70 a, the second member 70 b, and the third member 70 c. The first member 70a and the second member 70b are respectively fixed to both sides in the circumferential direction of the third member 70c.

  As shown in FIG. 4, a plurality of coil lead wires 36 are connected to each of the first member 70 a and the second member 70 b. Thus, the bus bar 70 is electrically connected to the coil lead wire 36. Two coil leader lines 36a and 36b of the coil leader lines 36 are connected to the first member 70a. Two coil leader lines 36c and 36d of the coil leader lines 36 are connected to the second member 70b.

  The first member 70a has a first member main body 70d, a first arm 74a, and a fixing portion 74b. The second member 70b includes a second member main body 70e, a first arm 74d, and a fixing portion 74e. That is, the bus bar 70 has a first member main body 70d, a first arm 74a, a fixing portion 74b, a second member main 70e, a first arm 74d, and a fixing portion 74e. In the present embodiment, the third member 70c and the fixing portions 74b and 74e constitute a power supply connecting portion 70f. The first member main body 70d is disposed along an imaginary line VL1 extending in one direction orthogonal to the axial direction Z. The second member main body 70e is disposed along an imaginary line VL2 extending in a direction parallel to the imaginary line VL1.

  In the following description, a direction parallel to the direction in which the virtual lines VL1 and VL2 extend is referred to as "longitudinal direction Y", and is appropriately shown in the Y-axis direction in each drawing. The positive side in the Y-axis direction in the front-rear direction Y is called “front side”, and the negative side in the Y-axis direction in the front-rear direction Y is called “rear side”. Further, a direction orthogonal to both the axial direction Z and the front-rear direction Y is referred to as “left-right direction X”, which is appropriately shown in the X-axis direction in each drawing. In the present embodiment, the front-rear direction Y corresponds to a second direction. The lateral direction X corresponds to the first direction. Further, in each portion of the plate-like bus bar 70, a direction perpendicular to both the extending direction of each portion and the thickness direction of each portion will be referred to as the “width direction” of each portion.

  The virtual line VL1 and the virtual line VL2 are arranged side by side in the left-right direction X as viewed along the axial direction Z. That is, the first member main body 70d and the second member main body 70e are arranged side by side in the left-right direction X as viewed along the axial direction Z. As shown in FIGS. 2 and 3, the first member main body 70 d and the second member main body 70 e are disposed with the central axis J in between in the radial direction. The first member main body 70d is disposed below the second member main body 70e.

  In the present embodiment, the other virtual line side in the left-right direction X is referred to as "left-right direction inner side" on the basis of the virtual lines VL1 and VL2, and the opposite side in the left-right direction X is "lateral outside". Call it In the present embodiment, the inside in the left-right direction corresponds to the inside in the radial direction, and the outside in the left-right direction corresponds to the outside in the radial direction.

  As shown in FIG. 4, the first member main body 70 d has a first coil connection portion 71 a and a second coil connection portion 72 a as a coil connection portion, and a second arm portion 73 a. That is, the bus bar 70 includes the first coil connection portion 71a and the second coil connection portion 72a, and the second arm portion 73a. In the present embodiment, the second arm 73 a corresponds to both the first portion and the second portion.

  The first coil connection portion 71 a has a plate shape whose plate surface is orthogonal to the axial direction Z. That is, in the present embodiment, the thickness direction of the plate-like first coil connection portion 71 a is parallel to the axial direction Z. Therefore, the dimension of the first coil connection portion 71a in the axial direction Z can be reduced, and the motor 10 can be easily miniaturized in the axial direction Z. Moreover, the left-right direction X which is 1st direction, and the front-back direction Y which is 2nd direction are orthogonal to the thickness direction of the 1st coil connection part 71a. In the first coil connection portion 71a, the front side corresponds to one side in the second direction, and the rear side corresponds to the other side in the second direction.

  The first coil connection portion 71 a is provided between the power supply connection portion 70 f of the bus bar 70 and the second coil connection portion 72 a. As shown in FIGS. 5 and 6, the first coil connection portion 71a includes a first through hole 77a as a through hole, first opposing portions 75a and 75d as a pair of opposing portions, a connecting portion 75g, and a wall. And 76. That is, the bus bar 70 has a first through hole 77 a, a pair of first opposing portions 75 a and 75 d, a connecting portion 75 g, and a wall portion 76. The first through hole 77a penetrates the first coil connection portion 71a in the thickness direction of the first coil connection portion 71a, that is, in the axial direction Z. The coil lead-out wire 36a is passed through the first through hole 77a.

  The pair of first opposing portions 75 a and 75 d is disposed with the first through hole 77 a interposed in the left-right direction X. The first facing portion 75a has a first holding portion 75b and a first crimped portion 75c. The first facing portion 75d has a first holding portion 75e and a first crimped portion 75f.

  The first coil connection portion 71a and the coil lead wire 36a are formed by caulking the first crimped portions 75c and 75f in the left-right direction X, and welding the peripheral portion of the first through hole 77a to the coil lead wire 36a. Connected 2 to 5 show the state before the first crimped portions 75c and 75f are crimped. FIG. 6 shows the state after the first crimped portions 75c and 75f are crimped. In the following description, the state before the crimped portions such as the first crimped portions 75c and 75f are crimped is simply referred to as "non-crimped state", and the crimped portions such as the first crimped portions 75c and 75f are crimped. The state is simply called "crimping state".

  As shown in FIGS. 5 and 6, the first through hole 77a has a first through portion 77b and a second through portion 77c. The first penetrating portion 77 b is a portion located between the first holding portions 75 b and 75 e. The coil lead wire 36a is passed through the first through portion 77b. The coil lead-out wire 36a contacts the inner side surface of the first through portion 77b. Thereby, the coil leader 36a contacts the inner side surface of the first through hole 77a. As shown in FIG. 5, in the non-crimped state, the first through portion 77 b has a substantially square shape as viewed in the axial direction Z. As shown in FIG. 6, in the crimped state, the inner side surface of the first through portion 77 b is closer to the shape along the outer peripheral surface of the coil lead wire 36 a than in the non-crimped state.

  The second penetrating portion 77c is a portion located between the first crimped portions 75c and 75f. The second penetrating portion 77c has a slit shape extending to the front side from the first penetrating portion 77b. As shown in FIG. 5, in the non-crimped state, the dimension L6 in the left-right direction X of the second through portion 77c is smaller than the dimension L5 in the left-right direction X of the first through portion 77b.

  The inner side surface of the first penetrating portion 77b has a support surface 77e. The support surface 77e extends in the left-right direction from the rear end of the inner surface on both sides in the left-right direction of the second through portion 77c toward the outside of the first through hole 77a. The support surface 77 e is a surface facing the rear side. As shown in FIG. 6, the support surface 77 e contacts the coil lead wire 36 a.

  Also in the crimped state, the dimension L6 in the left-right direction X of the second through portion 77c is smaller than the dimension L5 in the left-right direction X of the first through portion 77b. In the crimped state, the inner side surfaces on both sides in the left-right direction of the second through portion 77c contact each other. That is, in the crimped state, the second through portion 77c is in the closed state. As shown in FIG. 5, the dimension L8 of the second through portion 77c in the front-rear direction Y is larger than the dimension L7 of the first through portion 77b in the front-rear direction Y.

  The first holding parts 75b and 75e are parts of the pair of first facing parts 75a and 75d sandwiching the first penetrating part 77b. That is, the inner side surfaces on both sides in the left-right direction of the first through portion 77b are formed by the side surfaces of the first holding portions 75b and 75e. Further, as shown in FIG. 6, the first holding parts 75 b and 75 e are parts of the first facing parts 75 a and 75 d which sandwich the coil lead wire 36 a in the left-right direction X. The coil lead wire 36a sandwiched between the first sandwiching portions 75b and 75e contacts the first sandwiching portions 75b and 75e. The first holding portions 75 b and 75 e extend in the front-rear direction Y.

  The first crimped parts 75c and 75f are parts of the pair of first facing parts 75a and 75d which sandwich the second penetrating part 77c. That is, the inner side surfaces on both sides in the left-right direction of the second penetrating portion 77c are formed by the side surfaces of the first crimped portions 75c and 75f. The first crimped portions 75c and 75f are portions that are crimped toward the other first opposing portion in the left-right direction X. That is, the first crimped portion 75c is a portion of the first facing portion 75a that is crimped to the first facing portion 75d side in the left-right direction X. The first crimped portion 75f is a portion of the first facing portion 75d that is crimped to the side of the first facing portion 75a in the left-right direction X.

  The first crimped portions 75c and 75f extend in the front-rear direction Y. More specifically, the first crimped portions 75c and 75f extend rearward from the rear end of the second arm 73a and are connected to the front ends of the first holding portions 75b and 75e. The first crimped portion 75 c is connected to the front side of the first holding portion 75 b in the front-rear direction Y. The first crimped portion 75 f is connected to the front side of the first holding portion 75 e in the front-rear direction Y. As a result, the first caulking portions 75c and 75f are disposed closer to the second arm portion 73a than the first gripping portions 75b and 75e. In the crimped state, the first crimped portions 75c and 75f contact each other.

  As shown in FIG. 5, the dimension L4 in the left-right direction X of the first crimped portion 75c is smaller than the dimension L3 in the left-right direction X of the first holding portion 75b. Similarly, the dimension in the left-right direction X of the first crimped portion 75 f is smaller than the dimension in the left-right direction X of the first holding portion 75 e. For example, the dimension L4 in the left-right direction X of the first crimped portion 75c and the dimension in the left-right direction X of the first crimped portion 75f are the same. For example, the dimension L3 in the left-right direction X of the first holding portion 75b and the dimension in the left-right direction X of the first holding portion 75e are the same. The connecting portion 75g extends in the left-right direction X, and connects the first holding portion 75b and the first holding portion 75e. More specifically, the connecting portion 75g connects the rear end of the first holding portion 75b and the rear end of the first holding portion 75e.

  As shown in FIG. 5 and FIG. 6, the wall 76 is in the shape of a square pole. The wall portion 76 extends in the thickness direction of the first coil connection portion 71a, that is, in the axial direction Z from the inner edge portion of the first through hole 77a. More specifically, the wall portion 76 extends upward from the inner edge at the rear end of the first through portion 77 b. As shown in FIG. 6, the wall portion 76 is disposed on the rear side of the coil leader 36 a. The front surface of the wall 76 is in contact with the coil lead wire 36a passed through the first through portion 77b. The wall 76 and the coil leader 36a are fixed by welding.

  As shown in FIGS. 5 and 6, in both the non-crimped state and the crimped state, the dimension L2 in the left-right direction X of the first coil connection portion 71a in the portion where the first crimped portions 75c and 75f are provided is the first pinching It is smaller than the dimension L1 of the left-right direction X of the 1st coil connection part 71a in the part in which the parts 75b and 75e are provided. In the present embodiment, the lateral direction X is the width direction of the first coil connection portion 71a. Accordingly, the dimension in the width direction of the first coil connection portion 71a decreases in the front-rear direction Y from the first sandwiching portions 75b and 75e toward the first crimped portions 75c and 75f.

  As shown in FIG. 4, the second coil connection portion 72 a is disposed on the front side of the first coil connection portion 71 a. The second coil connection portion 72a is connected to the first coil connection portion 71a via the second arm portion 73a. The first coil connection portion 71a and the second coil connection portion 72a, which are two coil connection portions, are disposed on an imaginary line VL1 extending in the front-rear direction Y. A virtual line VL1 passes through the center of the first coil connection portion 71a in the left-right direction X and the center of the second coil connection portion 72a in the left-right direction X. That is, the first coil connection portion 71a and the second coil connection portion 72a are disposed at the same position in the left-right direction X. The shape of the second coil connection portion 72a is the same as the shape of the first coil connection portion 71a except that it is symmetrical in the front-rear direction Y.

  The second coil connection portion 72 a has a plate shape whose plate surface is orthogonal to the axial direction Z. That is, in the present embodiment, the thickness direction of the plate-like second coil connection portion 72 a is parallel to the axial direction Z. Therefore, the dimension of the second coil connection portion 72a in the axial direction Z can be reduced, and the motor 10 can be easily miniaturized in the axial direction Z. Moreover, the left-right direction X which is a 1st direction, and the front-back direction Y which is a 2nd direction are orthogonal to the thickness direction of 2nd coil connection part 72a. In the second coil connection portion 72a, the rear side corresponds to one side in the second direction, and the front side corresponds to the other side in the second direction.

  The second coil connection portion 72a includes a second through hole 77d as a through hole and second opposing portions 78a and 78d as a pair of opposing portions. Moreover, the 2nd coil connection part 72a has a connection part and a wall part similarly to the 1st coil connection part 71a. The second through hole 77 d penetrates the second coil connection portion 72 a in the thickness direction of the second coil connection portion 72 a, that is, in the axial direction Z.

  The coil lead-out wire 36b is connected to the second coil connection portion 72a in the same manner as the first coil connection portion 71a. The coil lead-out wire 36b is a coil lead-out wire 36 different from the coil lead-out wire 36a connected to the first coil connection portion 71a. The coil lead-out wire 36b is passed through the second through hole 77d and contacts the inner side surface of the second through hole 77d.

  The pair of second opposing portions 78a and 78d are disposed sandwiching the second through hole 77d in the left-right direction X. The pair of second opposing parts 78a and 78d are crimped toward the other second opposing parts 78a and 78d in the lateral direction X with the second holding parts 78e and 78f sandwiching the coil lead wire 36b in the lateral direction X And second crimped portions 78c and 78f, respectively. The second caulking portions 78c and 78f extend from the front end of the second arm 73a to the front, and are connected to the rear ends of the second holding portions 78b and 78e. The second crimped portion 78c is connected to the rear side of the second holding portion 78b in the front-rear direction Y. The second crimped portion 78 f is connected to the rear side of the second holding portion 78 e in the front-rear direction Y. As a result, the second caulking portions 78c and 78f are disposed closer to the second arm portion 73a than the second holding portions 78b and 78e.

  The second arm 73 a extends in the substantially front-rear direction Y as a whole. The second arm 73 a has a plate shape whose plate surface is orthogonal to the axial direction Z. That is, in the present embodiment, the thickness direction of the plate-like second arm 73 a is parallel to the axial direction Z. Therefore, the dimension of the second arm 73 a in the axial direction Z can be reduced, and the motor 10 can be easily miniaturized in the axial direction Z. The second arm portion 73a is connected to the first coil connection portion 71a and the second coil connection portion 72a, and connects two coil connection portions of the first coil connection portion 71a and the second coil connection portion 72a. That is, the second arm 73 a is a portion of the bus bar 70 between the first coil connection portion 71 a and the second coil connection portion 72 a.

  The second arm portion 73a has a first extending portion 73b, a second extending portion 73c, and a third extending portion 73d. As shown in FIG. 5, the first extending portion 73b is connected to the front end of the pair of first facing portions 75a, 75d, that is, the front end of the first crimped portion 75c, 75f. As shown in FIG. 4, the first extending portion 73 b is bent inward in the oblique left-right direction toward the front side and extends.

  The second extending portion 73c linearly extends from the end on the front side of the first extending portion 73b to the front side. The second extending portion 73c is disposed on the inner side in the left-right direction with respect to the virtual line VL1. The third extending portion 73 d is bent and extended obliquely outward in the left-right direction toward the front side from the front end of the second extending portion 73 c. The front end of the third extending portion 73d is connected to the rear end of the second coil connection portion 72a, that is, the rear ends of the second crimped portions 78c and 78f.

  As described above, when the extension portions extend, the middle portion of the second arm 73 a is recessed inward in the left-right direction. That is, in the present embodiment, the second arm 73a passes from the first coil connection portion 71a, which is one coil connection portion, to the other coil connection portion, passing through the region inward in the left-right direction with respect to the virtual line VL1. It extends to the coil connection portion 72a. In the present embodiment, the inner side in the left-right direction corresponds to one side in the first direction.

  The second arm 73 a has a recess 73 f that is recessed in the left-right direction X. The concave portions 73 f are provided in pairs at the end portions on both sides in the left-right direction at the rear end portion of the second arm portion 73 a. Further, a pair of concave portions 73f is provided at the end portions on both sides in the left-right direction at the front end portion of the second arm portion 73a. As shown in FIG. 5, in the non-crimped state, the inner edge of the recess 73 f has an arc shape as viewed in the axial direction Z.

  The first arm 74a is connected to the rear end of the first coil connection portion 71a. Thereby, the first arm 74a and the second arm 73a are connected via the first coil connection portion 71a. As shown in FIG. 4, the first arm 74 a extends in a broken line along the circumferential direction from the rear end of the first coil connection portion 71 a. The first arm 74 a has a plate shape whose plate surface is orthogonal to the axial direction Z. That is, in the present embodiment, the thickness direction of the plate-like first arm 74 a is parallel to the axial direction Z. Therefore, the dimension of the first arm 74 a in the axial direction Z can be reduced, and the motor 10 can be easily miniaturized in the axial direction Z.

  The end of the first arm 74a opposite to the first coil connection portion 71a is connected to the third member 70c via the fixing portion 74b. The fixing portion 74b is in the form of a plate extending upward from the end of the first arm 74a. The fixing portion 74b is fixed to the third member 70c.

  The second member main body 70e has a first coil connection portion 71b and a second coil connection portion 72b as coil connection portions, and a second arm portion 73e. That is, the bus bar 70 has the first coil connection portion 71 b and the second coil connection portion 72 b, and the second arm portion 73 e. In the present embodiment, the second arm 73 e corresponds to both the first portion and the second portion.

  The shape of the first coil connection portion 71b is the same as the shape of the first coil connection portion 71a. A coil lead-out wire 36c is connected to the first coil connection portion 71b. The first coil connection portion 71 a and the first coil connection portion 71 b are disposed at the same position in the front-rear direction Y. The shape of the second coil connection portion 72b is the same as the shape of the second coil connection portion 72a. A coil lead wire 36d is connected to the second coil connection portion 72b. The second coil connection portion 72 a and the second coil connection portion 72 b are disposed at the same position in the front-rear direction Y. The shape of the second arm 73 e is the same as the shape of the second arm 73 a except that it is symmetrical in the left-right direction X. The second arm 73 e is a portion of the bus bar 70 between the first coil connection portion 71 b and the second coil connection portion 72 b.

  The first arm 74 d extends radially outward from the rear end of the first coil connection portion 71 b. The first arm 74 d has a plate shape whose plate surface is orthogonal to the axial direction Z. That is, in the present embodiment, the thickness direction of the plate-like first arm 74 d is parallel to the axial direction Z. Therefore, the dimension of the first arm 74 d in the axial direction Z can be reduced, and the motor 10 can be easily miniaturized in the axial direction Z.

  The end of the first arm 74 d opposite to the first coil connection portion 71 b is connected to the third member 70 c via the fixing portion 74 e. The fixing portion 74e has a plate shape extending upward from the end of the first arm 74d. The fixing portion 74e is fixed to the third member 70c.

  The third member 70c has a terminal portion 79c, a first fixed arm 79a, and a second fixed arm 79b. The terminal portion 79c has a plate shape extending in the axial direction Z. The plate surface of the terminal portion 79c is orthogonal to the circumferential direction. As shown in FIG. 1, the terminal 79 c is connected to the control device 80. Thus, the power supply connection unit 70 f is connected to the control device 80.

  As shown in FIG. 4, the first fixed arm 79 a protrudes in the circumferential direction from the lower end of the terminal 79 c and is in the form of a plate that bends and extends downward. The first arm 74a is fixed to the first fixed arm 79a via the fixing portion 74b. As a result, the power supply connecting portion 70f and the first arm 74a are connected, and the power connecting portion 70f and the first coil connecting portion 71a are connected by the first arm 74a. That is, the first arm 74 a is a portion of the bus bar 70 between the power supply connection portion 70 f and the first coil connection portion 71 a.

  The second fixed arm 79 b is a plate that protrudes from the lower end of the terminal 79 c to the other side in the circumferential direction and is bent and extended downward. The first arm 74d is fixed to the second fixed arm 79b via the fixing portion 74e. As a result, the power supply connecting portion 70f and the first arm 74d are connected, and the power connecting portion 70f and the first coil connection 71b are connected by the first arm 74d. That is, the first arm 74 d is a portion of the bus bar 70 between the power supply connection portion 70 f and the first coil connection portion 71 b.

  As shown in FIG. 3, the three bus bars 70 are arranged at equal intervals along the circumferential direction. As viewed along the axial direction, the inner portion of each bus bar 70 surrounded by the first member body 70 d and the second member body 70 e has a regular hexagonal shape. In the present embodiment, each side of the regular hexagonal shape is formed by the second arm portions 73 a and 73 e in each bus bar 70. As described above, the middle portions of the second arms 73 a and 73 e are recessed inward in the left-right direction, that is, inward in the radial direction. Thus, as viewed in the axial direction, the space portion S is provided radially outward of the second arm portions 73a and 73e. The space portion S has a radial direction between the second arms 73a and 73e and the first coil connection portions 71a and 71b, and a radial direction between the second arms 73a and 73e and the second coil connection portions 72a and 72b. It is provided between.

  As shown in FIG. 2, the first member main body 70 d of each bus bar 70 passes under the second member main body 70 e of the other two bus bars 70. The second member main body 70 e of each bus bar 70 passes above the first member main body 70 d of the other two bus bars 70.

  As shown in FIG. 1, control device 80 is disposed on the upper side of bus bar unit 90. Control device 80 is electrically connected to bus bar 70 via terminal portion 79c. Control device 80 is a power supply that supplies power to stator 30 via bus bar 70. Control device 80 has an inverter circuit that controls the power supplied to stator 30.

  When power is supplied from control device 80, current flows to bus bar 70 and coil 35. The current supplied from the control device 80 flows from the power supply connection 70 f to each of the first arm 74 a and the first arm 74 d. The current flowing through the first arm 74a flows in the order of the first coil connection 71a, the second arm 73a, and the second coil connection 72a. When the current flows in the first coil connection portion 71a, the current flows in the coil lead wire 36a, and the current is supplied to the coil 35. When current flows in the second coil connection portion 72a, current flows in the coil lead wire 36b, and current is supplied to the coil 35 different from the coil 35 connected to the first coil connection portion 71a.

  In addition, the current that has flowed to the first arm 74d flows in the order of the first coil connection 71b, the second arm 73e, and the second coil connection 72b. When current flows in the first coil connection portion 71b, current flows in the coil lead wire 36c, and current flows in the coil 35 different from the coil 35 connected to the first coil connection portion 71a and the second coil connection portion 72a. Supplied. When a current flows in the second coil connection portion 72b, a current flows in the coil lead wire 36d, and the coil 35 different from the coil 35 connected to the first coil connection portions 71a and 71b and the second coil connection portion 72a A current is supplied.

  The method of manufacturing the motor 10 includes a bus bar manufacturing step of manufacturing the bus bar 70 and a connection step of connecting the bus bar 70 and the coil lead wire 36. The bus bar manufacturing process is provided prior to the connecting process. The bus bar manufacturing process includes a first member manufacturing process, a second member manufacturing process, a third member manufacturing process, and a welding process.

  In the first member manufacturing process, the worker punches out a part of the metal plate member to produce the second through portion 77c in each through hole. In addition, the worker makes a cut in a part of the plate member along the edge on both sides in the left-right direction of the first through portion 77b of each through hole. The production of the second penetration portion 77c and the incision is simultaneously performed by, for example, pressing.

  Then, the worker punches a portion including the second penetrating portion 77c and the cut in the plate member along the outer shape of the first member 70a. Thus, the first plate-like portion including the first coil connection portion 71a and the second coil connection portion 72a is punched out of the plate member. In this manner, the worker punches out the plate member to produce the first coil connection portion 71a and the second coil connection portion 72a.

  Then, the operator cuts and raises a part of the punched first plate-like portion along the above-described cut, to produce the first through portion 77 b and the wall portion 76 in each through hole. That is, in the bus bar manufacturing process, the operator cuts and raises a portion of the plate member to produce at least a portion of the first through hole 77a, at least a portion of the second through hole 77d, and the wall portion 76. As described above, since the wall 76 can be manufactured by cutting and raising a part of the plate member, for example, compared to the case where the separate member is fixed to the first plate portion to manufacture the wall, the wall 76 is manufactured. Is easy. The first through holes 77 a and the second through holes 77 d are produced by producing the first through parts 77 b. The operator bends one end of the punched first plate-like portion to produce the fixing portion 74b. Thus, the first member 70a is manufactured.

  In the second member manufacturing process, the worker manufactures the second member 70b in the same manner as the first member manufacturing process. In the third member manufacturing process, the worker punches a metal plate member along the outer shape of the third member 70c to produce a second plate-like portion. And a worker bends a part of 2nd plate-like part, and produces the 1st fixed arm part 79a and the 2nd fixed arm part 79b. Thereby, the third member 70c is manufactured.

  In the welding process, the worker fixes the fixing portion 74b of the first member 70a and the first fixing arm 79a of the third member 70c by welding. The operator fixes the fixing portion 74e of the second member 70b and the second fixing arm 79b of the third member 70c by welding. The bus bar 70 is manufactured by the above steps.

  As described above, according to the present embodiment, since the bus bar 70 is entirely plate-shaped, the bus bar 70 can be manufactured only by processing the plate member as described above. Therefore, the manufacturing cost of bus bar 70 can be reduced.

  The worker manufactures the three bus bars 70 by the bus bar manufacturing process described above. In the present embodiment, since the three bus bars 70 have the same shape, the three bus bars 70 can be manufactured by performing the same process as the above-described bus bar manufacturing process three times. Therefore, the manufacture of the three bus bars 70 can be facilitated. The operator arranges the three bus bars 70 on the bus bar holder 60. Thus, the bus bar unit 90 is manufactured.

  In the connection step, the operator inserts the bus bar unit 90 into the housing 11 and places the bus bar unit 90 on the upper surface of the bearing holder 40. At this time, the worker inserts the coil lead wires 36 protruding above the bearing holder 40 through the holder hole 40a into the first through holes 77a and the second coil connection portions 72a of the first coil connection portions 71a and 71b. , 72b through the second through hole 77d.

  Here, in the present embodiment, since the thickness direction of the first coil connection portions 71a and 71b is parallel to the axial direction Z, the first through holes 77a penetrate the first coil connection portions 71a and 71b in the axial direction Z. Do. Further, since the thickness direction of the second coil connection portions 72a and 72b is parallel to the axial direction Z, the second through holes 77d penetrate the second coil connection portions 72a and 72b in the axial direction Z. Therefore, the coil leader 36 extending in the axial direction Z from the stator 30 can be easily passed through the first through hole 77 a and the second through hole 77 d. In the present embodiment, the worker passes the coil lead wire 36 through the first through portion 77 b of each through hole.

  In the connection step, the worker crimps the pair of first opposing portions 75a and 75d sandwiching the first through hole 77a in the lateral direction X toward the other side of the first opposing portion in the lateral direction X. More specifically, the worker inserts an instrument for crimping on both sides in the left-right direction of the first coil connection portion 71a, and the first crimped portion 75c, 75f of the pair of first opposing portions 75a, 75d is used. Crimp to each other toward the other side of the first crimped portion.

  As shown in FIG. 6, in the present embodiment, the operator crimps the first crimped portions 75c, 75f until the first crimped portions 75c, 75f contact each other and the second penetrating portion 77c is closed. As the first crimped portions 75c and 75f are crimped and the second through portion 77c is closed, the front end of the first through portion 77b is also deformed in the closing direction. As a result, the coil lead wire 36a passed through the first through portion 77b is pushed rearward by the inner edge at the front end of the first through portion 77b and pressed against the wall 76. Therefore, the coil leader 36a is tightened from the entire circumference by the inner edge of the first through portion 77b and the front surface of the wall 76. Therefore, the coil lead-out wire 36a can be firmly held by the first coil connection portion 71a.

  As described above, according to the present embodiment, the coil lead wire 36a is attached to the bus bar 70 by caulking a part of the pair of first opposing portions 75a and 75d through the coil lead wire 36a through the first through hole 77a. It can be easily fixed. Therefore, it is not necessary to make the first coil connection portion 71a into a hook shape, and by providing the first through holes 77a in the bus bar 70, the first coil connection portion 71a can be manufactured. Thereby, when producing the 1st coil connection part 71a, it is not necessary to bend a board member many times, and can produce the 1st coil connection part 71a easily. Therefore, the labor and cost for manufacturing the motor 10 can be reduced.

  In addition, since the first coil connection portion 71a can be manufactured by providing the first through hole 77a, the first coil connection portion 71a can be provided in the middle portion of the bus bar 70. Therefore, it can suppress that the full length of bus bar 70 becomes large, and it is easy to miniaturize bus bar 70 whole. Thereby, the motor 10 can be easily miniaturized. As described above, according to the present embodiment, it is possible to obtain the motor 10 having a structure capable of reducing labor and cost of manufacturing and suppressing increase in size.

  Further, according to the present embodiment, the first holding portions 75b and 75e sandwiching the coil lead wire 36a and the first crimped portions 75c and 75f to be crimped are respectively provided. For example, in the case of caulking the first holding portions 75b and 75e sandwiching the coil lead wire 36a, it is necessary to caulge the first holding portions 75b and 75e together with the coil lead wire 36a, so caulking the first opposing portions 75a and 75d The power needed to On the other hand, by providing the caulked portions as the first caulking portions 75c and 75f separately from the first holding portions 75b and 75e, the force necessary for caulking the first opposing portions 75a and 75d can be reduced. . Therefore, the first opposing portions 75a and 75d can be easily crimped, and the time and effort of connecting the coil lead wire 36a to the first coil connection portion 71a can be reduced. Thereby, the effort and cost which manufacture the motor 10 can be reduced more.

  Further, according to the present embodiment, the first crimped parts 75c, 75f contact each other. Therefore, the work of caulking the first caulking portions 75c and 75f may be performed until the first caulking portions 75c and 75f contact with each other. Thus, the amount of deformation of the first caulking portions 75c and 75f can be easily made constant, and the coil lead wire 36a can be stably fixed to the first coil connection portion 71a by the caulking operation.

  Further, according to the present embodiment, the dimension L4 of the first crimped portion 75c, 75f in the left-right direction X is smaller than the dimension L3 of the first holding portion 75b, 75e in the left-right direction X. Therefore, the rigidity of the first crimped portions 75c, 75f can be relatively easily reduced, and the first crimped portions 75c, 75f can be crimped easily. Therefore, the effort which connects the coil lead-out wire 36a to the 1st coil connection part 71a can be reduced more, and the effort and cost which manufacture the motor 10 can be reduced more.

  Further, according to the present embodiment, in the non-crimped state, the dimension L6 in the left-right direction X of the second through portion 77c sandwiched between the first crimped portions 75c and 75f is the first range sandwiched between the first sandwiching portions 75b and 75e. It is smaller than the dimension L5 of the left-right direction X of the penetration part 77b. Therefore, when caulking, the amount of deformation of the first caulking portions 75c and 75f can be reduced, and caulking of the first caulking portions 75c and 75f is easier. Therefore, the effort which connects the coil lead-out wire 36a to the 1st coil connection part 71a can be reduced more, and the effort and cost which manufacture the motor 10 can be reduced more. In the present embodiment, the second through portion 77c has a slit shape extending to the front side from the first through portion 77b. Therefore, in the non-crimped state, the dimension L6 of the second through portion 77c in the left-right direction X can be easily reduced.

  In addition, since the dimension L6 in the left-right direction X of the second through portion 77c is smaller than the dimension L5 in the left-right direction X of the first through portion 77b, the inner side surface of the first through portion 77b faces the rear side. Have. Therefore, the support surface 77 e can be easily brought into contact with the coil lead wire 36 a. Therefore, compared with the case where the dimension of the 1st through-hole 77a of the left-right direction X is uniform, the area of the inner surface of the 1st through-hole 77a which contacts the outer peripheral surface of the coil lead-out wire 36a can be enlarged. Thereby, the coil leader 36a can be held more stably.

  Further, according to the present embodiment, in the non-crimped state, the first sandwiching portions 75b and 75e are provided with the dimension L2 in the left-right direction X of the first coil connection portion 71a in the portion where the first crimped portions 75c and 75f are provided. Is smaller than the dimension L1 in the left-right direction X of the first coil connection portion 71a in the portion to be cut. Therefore, when caulking the first caulking portions 75c and 75f, the caulking tools are easy to collectively hold the first caulking portions 75c and 75f from both sides in the left-right direction, and the caulking operation is easy to perform. In addition, since the first caulking portions 75c and 75f are recessed from the first holding portions 75b and 75e, it is easy to secure a space for inserting an instrument for caulking.

  Further, according to the present embodiment, a pair of recessed portions 73f is provided at the end portions on both sides in the left-right direction of the rear end portion of the second arm portion 73a. Therefore, it is possible to reduce the rigidity of the end of the second arm 73a on the side connected to the first crimped portion 75c, 75f. Thereby, it is easy to deform the end by the side connected with the 2nd arm 73a in the 1st caulking parts 75c and 75f. Therefore, the first crimped parts 75c, 75f can be more easily crimped.

  Further, according to the present embodiment, the second arm 73a extends from the first coil connection portion 71a to the second coil connection portion 72a through the region on the inner side in the left-right direction of the virtual line VL1. Therefore, when the bus bars 70 are combined as shown in FIG. 3, the space S can be provided between each coil connection portion of the other bus bar 70 and the second arm 73 a. Thereby, it is easier to secure a space for inserting an instrument for caulking the first caulking portions 75c, 75f.

  In the same manner as the first facing portions 75a and 75d described above, the worker can also perform the first facing portions 75a and 75d of the first coil connection portion 71b and the second facing portions 78a and 78d of the second coil connection portions 72a and 72b. Caulking. Thus, the four coil lead wires 36 a to 36 d are connected to the bus bar 70.

  In the connection step, the operator welds each coil connection portion and each coil lead wire after caulking each opposing portion in each coil connection portion. Therefore, bus bar 70 and coil lead-out wire 36 can be connected more firmly and more reliably. Therefore, the current from bus bar 70 can be suitably supplied to coil 35.

  More specifically, in the connection step, the operator welds each wall 76 and each coil leader 36. Examples of the welding method include arc welding such as TIG welding. The operator welds the wall 76 and the coil lead wire 36 by causing an arc discharge between the electrode of the welding torch and the wall 76. Since the wall 76 extends in the thickness direction of the coil connection, it is more likely to cause an arc discharge with the electrode of the welding torch as compared to the other part of the coil connection. Thereby, welding of the coil connection portion and the coil lead wire 36 can be facilitated by making the wall portion 76 a portion to be welded to the coil lead wire 36.

  Further, according to the present embodiment, the wall portion 76 in the first coil connection portion 71a is disposed on the rear side of the coil lead wire 36a, that is, on the opposite side to the side on which the first crimped portions 75c and 75f are provided. Therefore, when caulking the first caulking portions 75c and 75f, the coil leader 36a can be pressed against the wall 76, and the coil leader 36a and the wall 76 can be more reliably brought into contact with each other. Thereby, it is easy to weld the first coil connection portion 71a and the coil lead wire 36a. The same is true for the wall 76 at the other coil connection.

  Each bus bar 70 and the coil lead-out wire 36 are connected by the above connection process. Thereafter, the operator arranges the control device 80 to connect the control device 80 and the power supply connection portion 70 f of each bus bar 70. Thereby, the motor 10 is manufactured.

  The present invention is not limited to the above-described embodiment, and the following other configurations can be adopted. In each of the coil connection portions in the above-described embodiment, both of the pair of facing portions have a crimped portion, but the present invention is not limited to this. At least one of the pair of facing portions may have a crimped portion. In this case, in the connection step, at least one of the pair of facing portions is crimped toward the other facing portion side in the left-right direction X. That is, only a part of one facing portion may be crimped, and the other facing portion may not be crimped.

  In the crimped state, the crimped portions in the pair of facing portions may face each other in the left-right direction X with a gap. According to this configuration, even when the outer diameter of the coil lead wire is different, the amount of deformation of the crimped portion can be adjusted, and the coil lead wire can be suitably fixed to the coil connection portion. The dimension in the lateral direction X of the crimped portion may be the same as the dimension in the lateral direction X of the sandwiching portion, or may be larger than the dimension in the lateral direction X of the sandwiching portion.

  In the above-described embodiment, the caulking portions are respectively crimped in the left-right direction X in both the first coil connection portion and the second coil connection portion, but the present invention is not limited to this. The direction in which the first crimped portion in the first coil connection portion is crimped may be different from the direction in which the second crimped portion is crimped in the second coil connection portion. The two coil connection parts, the first coil connection part and the second coil connection part, may not be disposed on the same virtual line.

  The shape of the through hole is not particularly limited. The second penetration portion may not be slit-shaped. In the non-crimped state, the dimension of the second penetrating portion in the left-right direction X may be the same as the dimension of the first penetrating portion in the left-right direction X, or may be larger than the dimension of the first penetrating portion in the left-right direction X Good.

  In the non-crimped state, the dimension in the lateral direction X of the coil connection portion in the portion where the crimped portion is provided may be the same as the dimension in the lateral direction X of the coil connection portion in the portion where the sandwiching portion is provided May be larger than the dimension in the left-right direction X of the coil connection portion in the portion where the.

  The wall may be provided at any position on the inner edge of the through hole. Also, a plurality of wall portions may be provided for one through hole. The wall may not be provided. The recess may not be provided. The second arm as the second part may extend linearly along the imaginary line VL1. The thickness direction of the first arm and the thickness direction of the second arm may not be parallel to the axial direction Z.

  The bus bar may not have a plate-like shape as long as the coil connection portion has a plate shape. For example, portions of the bus bar other than the coil connection portion may be linear. The thickness direction of the coil connection portion may not be parallel to the axial direction Z. In the embodiment described above, although the longitudinal direction Y which is the second direction is configured to be orthogonal to the lateral direction X which is the first direction, it is not limited thereto. The second direction may or may not be orthogonal to the first direction. The number of bus bars is not particularly limited. The number of coil connection parts provided in one bus bar is not particularly limited as long as it is one or more. The bus bar may be a single member.

  If the dimension in the left-right direction X of the part sandwiching the slit-like second penetration part of the pair of opposing parts is smaller than the dimension in the left-right direction X of the part sandwiching the first penetration part in the pair of opposing parts, the crimped part May not be provided. In this case, since the width of the portion sandwiching the slit-like second through portion is reduced, the opposing portion is provided with a portion where the rigidity is partially lowered. Thereby, when the inner diameter of the first through portion is smaller than the outer diameter of the coil lead wire and the coil lead wire is press-fit into the first through portion, the portion sandwiching the second through portion is elastically deformed and the first through It is easy to expand the part, and the coil leader can be held by the elastic deformation of the opposing part. As described above, according to this configuration, since the coil lead wire can be fixed to the coil connection portion by press-fitting the coil lead wire into the first penetrating portion, the coil connection portion and the coil lead wire can be easily fixed.

  The bus bar manufacturing process is not particularly limited. In the first member manufacturing process, after the plate member is punched out along the outer shape of the first member, the second penetration portion and the above-mentioned cut may be produced, or the plate member is punched along the outer shape of the first member At the same time, the second penetration portion and the above-mentioned incision may be made. The production of the second penetration portion and the production of the incision may be performed separately. The creation of the above cuts may not be performed. In this case, for example, the worker may lift up while cutting a part of the plate member to produce the wall portion. Further, when the plate member is punched along the outer shape of the first member, at the same time, a part of the plate member may be cut and raised to produce the wall portion. Also, the wall may be manufactured by fixing a single separate member by welding or the like. In addition, these are the same also in a 2nd member manufacturing process.

  The connection step is not particularly limited as long as it includes caulking at least one of the pair of facing portions toward the other facing portion side in the left-right direction X. If the wall is not provided, the worker may weld the coil connection and the inner edge of the through hole in the connection step. The welding method is not particularly limited, and resistance welding other than arc welding may be employed. In the connecting step, the worker does not have to weld the coil connection portion and the coil lead wire.

  In addition, the application of the motor of embodiment mentioned above is not specifically limited. Moreover, each structure mentioned above can be combined suitably in the range which does not contradiction mutually.

  Reference Signs List 10 motor 20 rotor 21 shaft 30 stator 35 coil 36 coil lead wire 70 bus bar 71a, 71b first coil connection portion coil connection portion 72a 72b: second coil connection portion (coil connection portion) 73a, 73e second arm portion (first portion, second portion) 73f: recess portion 75a, 75d: first opposing portion (opposing portion) 75b, 75e: first holding portion (holding portion), 75c, 75f: first caulking portion (crimping portion) 76: wall portion, 77a: first through hole (through hole), 77d: second through hole (through hole) , 77b: first penetrating portion, 77c: second penetrating portion, 78a, 78d: second opposing portion (opposing portion), 78b, 78e: second clamping portion (nipping portion), 78c, 78f: second caulking portion Crimped part), J: central axis, VL1, VL2: virtual line, X Left-right direction (first direction), Y ... front-rear direction (second direction), Z ... axial direction (thickness direction)

Claims (18)

A rotor having a shaft disposed along a central axis,
A stator having a coil and facing the rotor in the radial direction via a gap;
A bus bar electrically connected to a wire extending from the coil;
Equipped with
The bus bar has a plate-like coil connection portion connected to the lead wire,
The coil connection is
A through hole penetrating the coil connection portion in the thickness direction of the coil connection portion;
A pair of opposing portions disposed across the through hole in a first direction orthogonal to the thickness direction;
Have
The wire is passed through the through hole and contacts the inner side surface of the through hole,
At least one of the pair of facing portions has a crimped portion caulked toward the other facing portion in the first direction. The pair of facing portions have a sandwiching portion sandwiching the conducting wire in the first direction,
The motor according to claim 1, wherein the caulking portion is connected to one side of the holding portion in a second direction orthogonal to the thickness direction and intersecting the first direction.   The motor according to claim 2, wherein the caulking parts in the pair of facing parts are in contact with each other.   The motor according to claim 2, wherein the caulking parts in the pair of facing parts face each other in the first direction with a gap therebetween.   The motor according to any one of claims 2 to 4, wherein the dimension of the caulking portion in the first direction is smaller than the dimension of the holding portion in the first direction. The through hole is
A first penetrating portion located between the holding portions;
A second penetrating portion located between the caulking portions;
Have
The dimension in the said 1st direction of the said 2nd penetration part is smaller than the dimension in the said 1st direction of the said 1st penetration part in the state before the said crimping | crimped part is crimped. The motor described in the section.   The motor according to claim 6, wherein the second penetrating portion is in the form of a slit extending from the first penetrating portion to one side in the second direction.   In the state before the crimped portion is crimped, the dimension in the first direction of the coil connecting portion in the portion in which the crimped portion is provided is the first direction of the coil connecting portion in the portion in which the sandwiching portion is provided A motor according to any one of claims 2 to 7, which is smaller than the dimensions.   The motor according to any one of claims 2 to 8, wherein the bus bar has a wall extending in the thickness direction from an inner edge of the through hole.   The motor according to claim 9, wherein the wall portion is disposed on the other side of the conducting wire in the second direction. The bus bar has a first portion connected to the coil connection portion;
The caulking portion extends from the end on the other side in the second direction of the first portion to the other side in the second direction,
The first portion has a recess recessed in the first direction,
The motor according to any one of claims 2 to 10, wherein the concave portion is provided in a pair at the end on both sides in the first direction at the end on the other side in the second direction of the first portion. The bus bar is
The two coil connections disposed on an imaginary line extending in the second direction;
A second portion connecting the two coil connection portions;
Have
The second part according to any one of claims 2 to 11, wherein the second part extends from one of the coil connection parts through the region on one side in the first direction with respect to the imaginary line to the other coil connection part. Motor.   The motor according to any one of claims 1 to 12, wherein the bus bar is generally plate-shaped.   The motor according to any one of claims 1 to 13, wherein the thickness direction is parallel to the axial direction. A rotor having a shaft disposed along a central axis,
A stator having a coil and facing the rotor in the radial direction via a gap;
A bus bar electrically connected to a wire extending from the coil;
Equipped with
The bus bar has a plate-like coil connection portion connected to the lead wire,
The coil connection is
A through hole penetrating the coil connection portion in the thickness direction of the coil connection portion;
A pair of opposing portions disposed across the through hole in a first direction orthogonal to the thickness direction;
Have
The wire is passed through the through hole and contacts the inner side surface of the through hole,
The through hole is a first through portion through which the conducting wire passes, and a slit-like second through portion extending from the first through portion to one side in a second direction orthogonal to the thickness direction and intersecting the first direction. Have a department,
The dimension in the first direction of the portion sandwiching the second penetrating portion of the pair of opposing portions is smaller than the dimension in the first direction of the portion sandwiching the first penetrating portion of the pair of opposing portions. motor. A rotor having a shaft disposed along a central axis, a stator having a coil, and a stator opposed to the rotor via a gap in the radial direction, and a bus bar electrically connected to a wire extending from the coil; A method of manufacturing a motor, comprising
Including a connecting step of connecting the bus bar and the conductor,
The bus bar has a plate-like coil connection portion connected to the lead wire,
The coil connection is
A through hole penetrating the coil connection portion in the thickness direction of the coil connection portion;
A pair of opposing portions disposed across the through hole in a first direction orthogonal to the thickness direction;
Have
In the connection step,
Passing the lead wire through the through hole;
A method of manufacturing a motor, comprising caulking at least one of the pair of facing portions toward the other facing portion in the first direction.   The method according to claim 16, wherein, in the connecting step, the coil connecting portion and the lead wire are welded after caulking the pair of facing portions. It is provided prior to the connection step, and includes a bus bar manufacturing step of manufacturing the bus bar,
In the bus bar manufacturing step, a portion of the plate member is cut and raised to produce at least a portion of the through hole and a wall portion extending in the thickness direction from an inner edge portion of the through hole,
The method for manufacturing a motor according to claim 17, wherein the wall portion and the conducting wire are welded in the connecting step.

Images